﻿using System;
using System.Data;
using System.Data.OracleClient;
using System.Collections;
using System.Reflection;

namespace zmMoniter
{
    /// <summary>
    /// 完成数据库连接，数据对比分析、数据更新、报警提示等操作
    /// </summary>
    public class PublicDataCls
    {
        protected OracleConnection Connection;
        private string connectionString;
        public PublicDataCls()
        {
            string connStr = (string)Properties.Settings.Default.Properties["connstring"].DefaultValue;
          
            
            connectionString = connStr;
            Connection = new OracleConnection(connectionString);
        }
        public PublicDataCls(string connStr)
        {
            connectionString = connStr;
            Connection = new OracleConnection(connectionString);
        }
      /*  #region 带参数的构造函数
        /// <summary>
        /// 带参数的构造函数
        /// </summary>
        /// <param name="ConnString">数据库联接字符串</param>
        public PublicDataCls(string ConnString)
        {
            string connStr;
            connStr = System.Configuration.ConfigurationSettings.AppSettings[ConnString].ToString();
            Connection = new OracleConnection(connStr);
        }
        #endregion
        */
        #region 打开数据库
        /// <summary>
        /// 打开数据库
        /// </summary>
        public string OpenConn()
        {
            try
            {
                if (this.Connection.State != ConnectionState.Open)
                    this.Connection.Open();
            }
            catch (Exception e)
            {
                return e.Message;
            }
            return "";
        }
        #endregion

        #region 关闭数据库联接
        /// <summary>
        /// 关闭数据库联接
        /// </summary>
        public void CloseConn()
        {
            if (Connection.State == ConnectionState.Open)
                Connection.Close();
        }

        #endregion

        #region 执行SQL语句，返回数据到DataSet中

        /// <summary>
        /// 执行SQL语句，返回数据到DataSet中
        /// </summary>
        /// <param name="sql">sql语句</param>
        /// <param name="DataSetName">自定义返回的DataSet表名</param>
        /// <returns>返回DataSet</returns>

        public DataSet ReturnDataSet(string sql, string DataSetName)
        {
            DataSet dataSet = new DataSet();
            OpenConn();
            OracleDataAdapter OraDA = new OracleDataAdapter(sql, Connection);
            OraDA.Fill(dataSet, DataSetName);
            //    CloseConn();
            return dataSet;
        }
        #endregion

        #region 执行Sql语句,返回带分页功能的dataset
        /// <summary>
        /// 执行Sql语句,返回带分页功能的dataset
        /// </summary>
        /// <param name="sql">Sql语句</param>
        /// <param name="PageSize">每页显示记录数</param>
        /// <param name="CurrPageIndex"><当前页/param>
        /// <param name="DataSetName">返回dataset表名</param>
        /// <returns>返回DataSet</returns>
        public DataSet ReturnDataSet(string sql, int PageSize, int CurrPageIndex, string DataSetName)
        {
            DataSet dataSet = new DataSet();
            OpenConn();
            OracleDataAdapter OraDA = new OracleDataAdapter(sql, Connection);
            OraDA.Fill(dataSet, PageSize * (CurrPageIndex - 1), PageSize, DataSetName);
            //    CloseConn();
            return dataSet;
        }
        #endregion
     
        #region 执行SQL语句，返回数据到DataTable中

        /// <summary>
        /// 执行SQL语句，返回数据到DataSet中
        /// </summary>
        /// <param name="sql">sql语句</param>
        /// <param name="DataSetName">自定义返回的DataSet表名</param>
        /// <returns>返回DataSet</returns>

        public DataTable ReturnDataTable(string sql)
        {
            try
            {
                DataTable dt = new DataTable();
                OpenConn();
                OracleDataAdapter OraDA = new OracleDataAdapter(sql, Connection);
                OraDA.Fill(dt);
                CloseConn();
                return dt;
            }
            catch (Exception ex)
            {
                return null;
            }
        }
        #endregion
       
        #region 执行SQL语句，返回 DataReader,用之前一定要先.read()打开,然后才能读到数据
        /// <summary>
        /// 执行SQL语句，返回 DataReader,用之前一定要先.read()打开,然后才能读到数据
        /// </summary>
        /// <param name="sql">sql语句</param>
        /// <returns>返回一个OracleDataReader</returns>
        public OracleDataReader ReturnDataReader(String sql)
        {
            OpenConn();
            OracleCommand command = new OracleCommand(sql, Connection);
            return command.ExecuteReader(System.Data.CommandBehavior.CloseConnection);
        }
        #endregion

        #region 执行SQL语句，返回记录总数数
        /// <summary>
        /// 执行SQL语句，返回记录总数数
        /// </summary>
        /// <param name="sql">sql语句</param>
        /// <returns>返回记录总条数</returns>
        public int GetRecordCount(string sql)
        {
            int recordCount = 0;
            OpenConn();
            OracleCommand command = new OracleCommand(sql, Connection);
            OracleDataReader dataReader = command.ExecuteReader();
            while (dataReader.Read())
            {
                recordCount++;
            }
            dataReader.Close();
            //    CloseConn();
            return recordCount;
        }
        #endregion

        #region 取当前序列,条件为seq.nextval或seq.currval
        /// <summary>
        /// 取当前序列
        /// </summary>
        /// <param name="seqstr"></param>
        /// <param name="table"></param>
        /// <returns></returns>
        public decimal GetSeq(string seqstr)
        {
            decimal seqnum = 0;
            string sql = "select " + seqstr + " from dual";
            OpenConn();
            OracleCommand command = new OracleCommand(sql, Connection);
            OracleDataReader dataReader = command.ExecuteReader();
            if (dataReader.Read())
            {
                seqnum = decimal.Parse(dataReader[0].ToString());
            }
            dataReader.Close();
            //    CloseConn();
            return seqnum;
        }
        #endregion



        #region 执行SQL语句,返回所影响的行数
        /// <summary>
        /// 执行SQL语句,返回所影响的行数
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>
        public int ExecuteSQL(string sql)
        {
            int Cmd = 0;
            OpenConn();
            OracleCommand command = new OracleCommand(sql, Connection);
            try
            {
                Cmd = command.ExecuteNonQuery();
            }
            catch
            {
                return -1;
            }
            finally
            {
                //     CloseConn();
            }
            return Cmd;
        }
        #endregion
        public int InsertClobValue(string sql, string sValue)
        {
            int Cmd = 0;
            OpenConn();
            OracleCommand command = new OracleCommand(sql, Connection);
            OracleParameter op = new OracleParameter("pb",OracleType.Clob);
            op.Value = sValue;
            command.Parameters.Add(op);
            
             try
            {
                Cmd = command.ExecuteNonQuery();
            }
            catch
            {
            }
            finally
            {
                //     CloseConn();
            }
            return Cmd;
        }

        //　＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

        //　用hashTable对数据库进行insert,update,del操作,注意此时只能

        //   用默认的数据库连接"connstr"

        //　＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

        #region 根据表名及哈稀表自动插入数据库 用法：Insert("test",ht)
        public int Insert(string TableName, Hashtable ht)
        {
            OracleParameter[] Parms = new OracleParameter[ht.Count];
            IDictionaryEnumerator et = ht.GetEnumerator();
            DataTable dt = GetTabType(TableName);
            System.Data.OracleClient.OracleType otype;
            int size = 0;
            int i = 0;
            while (et.MoveNext()) // 作哈希表循环
            {
                GetoType(et.Key.ToString().ToUpper(), dt, out otype, out size);
                System.Data.OracleClient.OracleParameter op = MakeParam(":" + et.Key.ToString(), otype, size, et.Value.ToString());
                Parms[i] = op; // 添加SqlParameter对象
                i = i + 1;
            }
            string str_Sql = GetInsertSqlbyHt(TableName, ht); // 获得插入sql语句
            int val = ExecuteNonQuery(str_Sql, Parms);
            return val;
        }
        #endregion

        #region 根据相关条件对数据库进行更新操作 用法：Update("test","Id=:Id",ht);

        public int Update(string TableName, string ht_Where, Hashtable ht)
        {
            OracleParameter[] Parms = new OracleParameter[ht.Count];
            IDictionaryEnumerator et = ht.GetEnumerator();
            DataTable dt = GetTabType(TableName);
            System.Data.OracleClient.OracleType otype;
            int size = 0;
            int i = 0;
            // 作哈希表循环

            while (et.MoveNext())
            {
                GetoType(et.Key.ToString().ToUpper(), dt, out otype, out size);
                System.Data.OracleClient.OracleParameter op = MakeParam(":" + et.Key.ToString(), otype, size, et.Value.ToString());
                Parms[i] = op; // 添加SqlParameter对象
                i = i + 1;
            }
            string str_Sql = GetUpdateSqlbyHt(TableName, ht_Where, ht); // 获得插入sql语句
            int val = ExecuteNonQuery(str_Sql, Parms);
            return val;
        }
        #endregion

        #region del操作

        //,注意此处条件个数与hash里参数个数应该一致
        //用法：Del("test","Id=:Id",ht)
        public int Del(string TableName, string ht_Where, Hashtable ht)
        {
            OracleParameter[] Parms = new OracleParameter[ht.Count];
            IDictionaryEnumerator et = ht.GetEnumerator();
            DataTable dt = GetTabType(TableName);
            System.Data.OracleClient.OracleType otype;
            int i = 0;
            int size = 0;
            // 作哈希表循环
            while (et.MoveNext())
            {
                GetoType(et.Key.ToString().ToUpper(), dt, out otype, out size);
                System.Data.OracleClient.OracleParameter op = MakeParam(":" + et.Key.ToString(), et.Value.ToString());
                Parms[i] = op; // 添加SqlParameter对象
                i = i + 1;
            }
            string str_Sql = GetDelSqlbyHt(TableName, ht_Where, ht); // 获得删除sql语句
            int val = ExecuteNonQuery(str_Sql, Parms);
            return val;
        }
        #endregion



        //　＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

        //　＝＝＝＝＝＝＝＝上面三个操作的内部调用函数＝＝＝＝＝＝＝

        //　＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

        #region 根据哈稀表及表名自动生成相应insert语句(参数类型的)

        /// <summary>
        /// 根据哈稀表及表名自动生成相应insert语句
        /// </summary>
        /// <param name="TableName">要插入的表名</param>
        /// <param name="ht">哈稀表</param>
        /// <returns>返回sql语句</returns>
        public static string GetInsertSqlbyHt(string TableName, Hashtable ht)
        {
            string str_Sql = "";
            int i = 0;
            int ht_Count = ht.Count; // 哈希表个数
            IDictionaryEnumerator myEnumerator = ht.GetEnumerator();
            string before = "";
            string behide = "";
            while (myEnumerator.MoveNext())
            {
                if (i == 0)
                {
                    before = "(" + myEnumerator.Key;
                }
                else if (i + 1 == ht_Count)
                {
                    before = before + "," + myEnumerator.Key + ")";
                }
                else
                {
                    before = before + "," + myEnumerator.Key;
                }
                i = i + 1;
            }
            behide = " Values" + before.Replace(",", ",:").Replace("(", "(:");
            str_Sql = "Insert into " + TableName + before + behide;
            return str_Sql;
        }
        #endregion

        #region 根据表名，where条件，哈稀表自动生成更新语句(参数类型的)

        public static string GetUpdateSqlbyHt(string Table, string ht_Where, Hashtable ht)
        {
            string str_Sql = "";
            int i = 0;
            int ht_Count = ht.Count; // 哈希表个数
            IDictionaryEnumerator myEnumerator = ht.GetEnumerator();
            while (myEnumerator.MoveNext())
            {
                if (i == 0)
                {
                    if (ht_Where.ToString().ToLower().IndexOf((myEnumerator.Key + "=:" + myEnumerator.Key).ToLower()) == -1)
                    {
                        str_Sql = myEnumerator.Key + "=:" + myEnumerator.Key;
                    }
                }
                else
                {
                    if (ht_Where.ToString().ToLower().IndexOf((":" + myEnumerator.Key + " ").ToLower()) == -1)
                    {
                        str_Sql = str_Sql + "," + myEnumerator.Key + "=:" + myEnumerator.Key;
                    }
                }
                i = i + 1;
            }
            if (ht_Where == null || ht_Where.Replace(" ", "") == "") // 更新时候没有条件
            {
                str_Sql = "update " + Table + " set " + str_Sql;
            }
            else
            {
                str_Sql = "update " + Table + " set " + str_Sql + " where " + ht_Where;
            }
            str_Sql = str_Sql.Replace("set ,", "set ").Replace("update ,", "update ");
            return str_Sql;
        }
        #endregion

        #region 根据表名，where条件，哈稀表自动生成del语句(参数类型的)
        public static string GetDelSqlbyHt(string Table, string ht_Where, Hashtable ht)
        {
            string str_Sql = "";
            int i = 0;
            int ht_Count = ht.Count; // 哈希表个数
            IDictionaryEnumerator myEnumerator = ht.GetEnumerator();
            while (myEnumerator.MoveNext())
            {
                if (i == 0)
                {
                    if (ht_Where.ToString().ToLower().IndexOf((myEnumerator.Key + "=:" + myEnumerator.Key).ToLower()) == -1)
                    {
                        str_Sql = myEnumerator.Key + "=:" + myEnumerator.Key;
                    }
                }
                else
                {
                    if (ht_Where.ToString().ToLower().IndexOf((":" + myEnumerator.Key + " ").ToLower()) == -1)
                    {
                        str_Sql = str_Sql + "," + myEnumerator.Key + "=:" + myEnumerator.Key;
                    }
                }
                i = i + 1;
            }
            if (ht_Where == null || ht_Where.Replace(" ", "") == "") // 更新时候没有条件
            {
                str_Sql = "Delete " + Table;
            }
            else
            {
                str_Sql = "Delete " + Table + " where " + ht_Where;
            }
            return str_Sql;
        }
        #endregion

        #region 生成oracle参数
        /// <summary>
        /// 生成oracle参数
        /// </summary>
        /// <param name="ParamName">字段名</param>
        /// <param name="otype">数据类型</param>
        /// <param name="size">数据大小</param>
        /// <param name="Value">值</param>
        /// <returns></returns>

        public static OracleParameter MakeParam(string ParamName, System.Data.OracleClient.OracleType otype, int size, Object Value)
        {
            OracleParameter para = new OracleParameter(ParamName, Value);
            para.OracleType = otype;
            para.Size = size;
            return para;
        }
        #endregion

        #region 生成oracle参数

        public static OracleParameter MakeParam(string ParamName, string Value)
        {
            return new OracleParameter(ParamName, Value);
        }
        #endregion

        #region 根据表结构字段的类型和长度拼装oracle sql语句参数

        public static void GetoType(string key, DataTable dt, out System.Data.OracleClient.OracleType otype, out int size)
        {
            DataView dv = dt.DefaultView;
            dv.RowFilter = "column_name='" + key + "'";
            string fType = dv[0]["data_type"].ToString().ToUpper();
            switch (fType)
            {
                case "DATE":
                    otype = OracleType.DateTime;
                    size = int.Parse(dv[0]["data_length"].ToString());
                    break;
                case "CHAR":
                    otype = OracleType.Char;
                    size = int.Parse(dv[0]["data_length"].ToString());
                    break;
                case "LONG":
                    otype = OracleType.Double;
                    size = int.Parse(dv[0]["data_length"].ToString());
                    break;
                case "NVARCHAR2":
                    otype = OracleType.NVarChar;
                    size = int.Parse(dv[0]["data_length"].ToString());
                    break;
                case "VARCHAR2":
                    otype = OracleType.NVarChar;
                    size = int.Parse(dv[0]["data_length"].ToString());
                    break;
                default:
                    otype = OracleType.NVarChar;
                    size = 100;
                    break;
            }
        }
        #endregion

        #region 动态 取表里字段的类型和长度,此处没有动态用到connstr,是默认的
        public System.Data.DataTable GetTabType(string tabnale)
        {
            string sql = "select column_name,data_type,data_length " +
                "from all_tab_columns where table_name='" + tabnale.ToUpper() + "'";
            OpenConn();
            return (ReturnDataSet(sql, "dv")).Tables[0];
        }
        #endregion

        #region 执行sql语句
        public int ExecuteNonQuery(string cmdText, params OracleParameter[] cmdParms)
        {
            OracleCommand cmd = new OracleCommand();
            OpenConn();
            cmd.Connection = Connection;
            cmd.CommandText = cmdText;
            if (cmdParms != null)
            {
                foreach (OracleParameter parm in cmdParms)
                    cmd.Parameters.Add(parm);
            }
            int val = cmd.ExecuteNonQuery();
            cmd.Parameters.Clear();
            // conn.CloseConn();
            return val;
        }
        #endregion

        //　＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

        //　＝＝＝＝＝＝＝＝＝内部调用函数完＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

        //　＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

    }
}
